Polymer-Assisted Electrospinning of Mesoporous Titanium Dioxide Nanofibers

• Main Authors: Jiun-Yu Chen, 陳俊佑
• Other Authors: Changshu Kuo
• Format: Others
• Language: en_US
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/98092938000120437630

碩士 === 國立成功大學 === 材料科學及工程學系碩博士班 === 94 === Titanium dioxide nanofibers were fabricated via a polymer-assisted electrospinning technique. A mixture of titanium-tetraisopropoxide (TTIP) and poly(vinylpyrrolidone) (PVP) in an alcohol medium utilized as the sol-gel solution was ejected through a needle under a strong electrical field. In company with the solvent evaporation and the sol-gel solidification, highly charged polymer jet induces the formation of polymer/metal oxide nanofibers before reaching to the ground electrode. Calcination process was carried out afterward to encourage the crystallization and phase transformation of titania, as well as the removal of polymer domains. Electrospinning process and calcined titania nanofibers exhibited strong relationship with the presence of polymer media. Process parameters and the characterizations of nanoconstructed titania nanofibers were investigated and discussed. Micron-scaled thick films produced by the same PVP/TTIP sol-gel solutions were prepared to compare with one-dimensional titania nanofibers.